L-Valine
Valine
is a branched chain amino acid along
with, Leucine and Isoleucine, and
these all are essential amino acids.
They are called “Branched Chain”
amino acids because their carbon
structures are marked by branched
points. Valine is also known as
(a)-aminoisovaleric acid, C5 H11
NO2 and is represented by Val; or
V and has a mass of 99.14.
Function-
Valine has a stimulant effect and
is needed for muscle metabolism,
tissue repair, and the maintenance
of a proper nitrogen balance in
the body. Valine is found in high
concentrations in muscle tissue.
It may be helpful in treating liver
and gallbladder disease, and it
is good for correcting the type
of severe amino acid deficiencies
that can be caused by drug addiction.
People with chronic kidney failure
may also benefit from branched chain
amino acids (BCAAs) supplementation.
A preliminary study found improved
breathing and sleep quality in people
given branched chain amino acids
during kidney dialysis.
Although
the structure of the branched chain
amino acids (BCAAs) is similar they
have different metabolic routes.
The breakdown of leucine is entirely
through fat pathways, valine is
entirely through carbohydrate pathways
and isoleucine is through both.
Deficiency-
In animal studies a deficiency of
valine results in a deficiency of
disaccharidase enzyme and displayed
symptoms of neurological symptoms,
aimless circling and staggering
mobility.
Sources-
Dietary sources of valine include
dairy products, nuts, chickpeas,
rye, liver, lentils, grains, meat,
mushrooms, peanuts, and soy protein.
Precautions-
The inborn error of metabolism is
ketoaciduria (Maple Urine Disease)
in which keto acids are excreted.
Maple syrup urine can produce convulsions,
ataxia and coma in severe cases.
Requirements-
Supplemental L-valine should always
be taken in balance with the other
branched-chain amino acids, L-isoleucine
and L-leucine. There is no Recommended
Dietary Allowances (RDA) listed.
Individual needs may differ due
to clinical conditions, biochemical
individuality and absorption. All
sources of nutrients should be consumed
in their most natural state, in
the form of a variety of foods or
supplements when necessary. Free
form amino acid supplements are
immediately absorbed by the body
and should be consumed with natural
occurring cofactors for best results.
Consulting with a physician that
is properly trained in the natural
healing sciences and amino acid
therapy may be needed for optimum
results.
Written
by Jerome
Rerucha D.C.
References-
1. Van Hall G, Raaymakers JSH, Saris
WHM, Wagenmakers AJM. Supplementation
with branched-chain amino acids
(BCAA) and tryptophan has no effect
on performance during prolonged
exercise. Clin Sci 1994;87:52 [abstract
#75].
2. Madsen K, MacLean DA, Kiens B,
et al. Effects of glucose, glucose
plus branched-chain amino acids,
or placebo on bike performance over
100 km. J Appl Physiol 1996;81:2644–50.
3. Schena F, Guerrini F, Tregnaghi
P, et al. Branched-chain amino acid
supplementation during trekking
at high altitude. The effects on
loss of body mass, body composition,
and muscle power. Eur J Appl Physiol
1992;65:394–8.
4. Blomstrand E, Hassmen P, Ek S,
et al. Influence of ingesting a
solution of branched-chain amino
acids on perceived exertion during
exercise. Acta Physiol Scand 1997;159:41–9.
5. Blomstrand E, Hassmen P, Ekblom
B, et al. Administration of branched-chain
amino acids during sustained exercise—effects
on performance and on plasma concentration
of some amino acids. Eur J Appl
Physiol 1991;63:83–8.
6. Zello GA, Wykes LF, Ball RO,
et al. Recent advances in methods
of assessing dietary amino acid
requirements for adult humans. J
Nutr 1995;125:2907–15.
7. Kato M, Miwa Y, Tajika M, et
al. Preferential use of branched-chain
amino acids as an energy substrate
in patients with liver cirrhosis.
Intern Med 1998;37:429–34.
8. Wahren J, Denis J, Desurmont
P, et al. Is intravenous administration
of branched chain amino acids effective
in the treatment of hepatic encephalopathy?
A multicenter study. Hepatology
1983;3:475–80.
9. Blomstrand E, Ek S, Newsholme
EA. Influence of ingesting a solution
of branched-chain amino acids on
plasma and muscle concentrations
of amino acids during prolonged
submaximal exercise. Nutrition 1996;12:485–90.
10. Vukovich MD, Sharp RL, Kesl
LD, et al. Effects of a low-dose
amino acid supplement on adaptations
to cycling training in untrained
individuals. Int J Sport Nutr 1997;7:298–309.